[LordHefner]

Originally Posted by ScottB5

Monday was the first time I drove the car for almost a week, there was no issues with starting and no errors apart from brake pad warning lights.
Thats random at the moment.

Drove the car monday, left it till tuesday, drove it again and not touched it till wednesday when Lordhefner came over to look at his lights.
Looking at the cars I noticed the battery was slightly flat.
I went to start the car and just started.
I left it idling and monitored the battery level slowly climb.
I turned the car off when it was at about 60-70%.

Left the car till this morning and it went flat. No error, no lights, just a handfull of clicking.
Jump started the car and went off to work. I took the long way to work which is about 30 minutes drive.

Got in work and the battery monitor still displayed 10%.

Got VCDs out and did a scan.

All looking better but no fault codes for the battery. So I guess that's good.

I went in to the battery regulator and checked the battery was set up correctly and it was.
Checked the measuring blocks and its charging at 14.5v, the battery is getting 14.5v volts but battery state is still 10%.

I think the battery is less than 2 years old and hopefully still under warranty if it is the battery.

Anyone got any idea why the battery level and state of charge will stick at 10%?

Mine after you added the battery warning monitor to mine, after we played that afternoon and mine left yours reading at 65%, but I kept it on and watched it and after 24 miles it finally reached back to 100%, I had the radio on but only Radio 2 so nothing too demanding for the amps and the speakers, and it wasn't raining and didn't have any lights on. So it appears that with the Audi A8 being a heavy electrical dependant car, with all of it's gadgets, I was surprised that it took this sort of distance to charge the car back to full.

Now that I've got it fitted I'll monitor it over the shorter lower speed journeys and see if we can't work out how energy efficient these cars are. Hopefully it is not your battery as after seeing the size of it, I can't imagine that a decent replacement will be cheap to replace and Halfords are unlikely to have one on the shelf in their branded, four year no quibbles return policy which is they way I've always done batteries till now with the likes of my partners and family members cars.

Regards, Mark.